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PhabricatorSSHKeyGenerator.php
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			<?php

			final class PhabricatorSSHKeyGenerator extends Phobject {

			public static function assertCanGenerateKeypair() {
			$binary = 'ssh-keygen';
			if (!Filesystem::resolveBinary($binary)) {
			throw new Exception(
			pht(
			'Can not generate keys: unable to find "%s" in PATH!',
			$binary));
			}
			}

			public static function generateKeypair() {
			self::assertCanGenerateKeypair();

			$tempfile = new TempFile();
			$keyfile = dirname($tempfile).DIRECTORY_SEPARATOR.'keytext';

			execx(
			'ssh-keygen -t rsa -N %s -f %s',
			'',
			$keyfile);

			$public_key = Filesystem::readFile($keyfile.'.pub');
			$private_key = Filesystem::readFile($keyfile);

			return array($public_key, $private_key);
			}

			}